Namikawa_2019_ApJ_882_62.pdf (1.2 MB)
Evidence for the cross-correlation between cosmic icrowave background polarization lensing from Polarbear and cosmic shear from Subaru Hyper Suprime-Cam
journal contribution
posted on 2023-06-09, 19:16 authored by T Namikawaw, Y Chinone, H Miyatake, M Oguri, R Takahashi, A Kusaka, N Katayama, S Adachi, M Aguilar, H Aihara, A Ali, R Armstrong, K Arnold, C Baccigalupi, Giulio Fabbian, The Polarbear Collaboration, the Subaru HSC SSP CollaborationWe present the first measurement of cross-correlation between the lensing potential, reconstructed from cosmic microwave background (CMB) polarization data, and the cosmic shear field from galaxy shapes. This measurement is made using data from the POLARBEAR CMB experiment and the Subaru Hyper Suprime-Cam (HSC) survey. By analyzing an 11 deg2 overlapping region, we reject the null hypothesis at 3.5s and constrain the amplitude of the cross-spectrum to Alens = 1.70 +/- 0.48, where Alens is the amplitude normalized with respect to the Planck 2018 prediction, based on the flat ? cold dark matter cosmology. The first measurement of this cross- spectrum without relying on CMB temperature measurements is possible owing to the deep POLARBEAR map with a noise level of ~6µKarcmin, as well as the deep HSC data with a high galaxy number density of ng = 23 arcmin-2. We present a detailed study of the systematics budget to show that residual systematics in our results are negligibly small, which demonstrates the future potential of this cross-correlation technique.
Funding
Precision cosmological parameters : CosmoPars; G1365; EUROPEAN UNION; 616170 ERC-2013-CoG
History
Publication status
- Published
File Version
- Published version
Journal
Astrophysical JournalISSN
0004-637XPublisher
Institute of PhysicsExternal DOI
Issue
1Volume
882Page range
62Department affiliated with
- Physics and Astronomy Publications
Research groups affiliated with
- Astronomy Centre Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2019-10-07First Open Access (FOA) Date
2019-10-07First Compliant Deposit (FCD) Date
2019-10-07Usage metrics
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